Type-writing machine.



A. J. BRIGGS.

TYPE WRITING MACHINE.

APPLICATION FILED DEC-11.1913- Y n R l U ..N. R w D m E T :6 W T m E .I M M m a C 5 W l E 5 M M E 5 N 1 W q J. BRIG-GS.

TYPE WRITING MACHINE APPLICATION FILED DEC. n. 1913.

Patented Feb. 6,1917.

2 SHEETS-"SHEET 2.

UNITED STATES PATENT OFFICE.

ARTHUR J. BRIGGS, OF SYRACUSE, NEW YORK, ASSIGNOR T0 REMINGTON TYPEWBITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Feb. 6, 1917.

To all whom it may concern:

Be it known that I, ARTHUR J. BRIGGS, citizen of the United States, and resident of Syracuse, in the county of Onondaga and State of New York, have invented certain new and useful Improvements in Type- VVriting' Machines, of which the following is a specification. Y

My invention relates to typewriting machines and more particularly to ribbon feed mechanism for such machines.

The main object of my invention, generally stated, is to provide ribbon feed mechanism which is simple in construction, efficient in use and may be manufactured at small cost.

To the above and other ends which will hereinafter appear, my invention consists in same, the section being taken on a line x-w of Fig. 5 and looking inthe direction of the arrow at said line.

Fig. 3 is an enlarged detail fragmentary side elevation, with parts in section, of one of the ribbon spools and some of the associated parts.

4 is-a the ribbon vibrator and some of the associated parts.

Fig. 5 is an enlarged fragmentary hori zontal sectional viewfshowing aortion'of the ribbon mechanism, -the section 'being taken on the line of Fig. 1 and looking" in the direction of the arrow at said line.

In this view: the ribbon, and-cover" -a'race-way'21 or the reception of the antiplates for the casings are omitted.

Fig. 6 is an enlargeddetail fragmentary]- sectional viewof a portion of the structure,

the section being taken on the line .e--z of fragmentary front elevation of Fig. 5 and looking in the direction of the arrow at said line.

I have shown my invention embodied in the present instance in a front-strike typewritlng machine of the character disclosed in my applications, Serial Nos. 782,859, 786,107, 786,108, 790,583, 791,734, 795,667 and 802,7 85, previously filed by me and some of the features disclosed herein are claimed in certain of said previously filed applications. It should be understood, however, that my present invention may be embodied in other styles of typewriting machines.

In the present construction segmentally arranged type. bars 1 are pivoted at 2 to swing upwardly and rearwardly and to strike against the front face of a platen 3.

Each type bar is pivoted to a hanger 4 secured by screws'5 to a type bar segment 6 connected at its ends to the side plates of the frame 7 of the machine. Each type bar is connected, through a pull link 8, with suitable key controlledv actuating devices, such for example as those illustrated in my application, Serial No. 7 95,667, and by which the type bars are operated.

A segmental umversal bar 9 is so arranged that the front edge 10 thereof is engaged by the front edge of each type. bar, near the heel of the latter, as the type bar moves to the printing position. The universal bar being engaged in the manner described by the type bars is moved from the normal position shown in Fig. 1 rearwardly to effect an actuation of. the escapement mechanism (not shown) and the ribbon mechanism as will hereinafter more clearly appear.

A platen 3 is carried by a platen shaft 11 which is received in bearing openings in end plates 12 of the carriage, said end plates extending upwardly from'a traverse bar 13 mounted for movement from side to sideof the machine. Thus the traverse bar is provided withoppo'sitely disposed race-ways 14 which receive anti-friction balls 15 and 16.

The bills 16 are also received in a race-way 17 formed in a shift bar, rail or frame 18. This bar 18 has a plate 19 secured thereto by ews 20, the late being grooved to form friction balls ,15. In this manner the. carrlage' comprising the traverse bar 13 and end plates 12, united by a tie rod 22, is supported to travel from side to side of the machine on the shift rail 18.

The construction of the carriage and the manner of mounting the same is claimed in my application, Serial No. 782,859 hereinbefore referred to.

The shift rail or bar 18 is mounted on and guided by parallel shift links 23, each pivoted at its forward end, as at 24, to'the shift rail and pivoted at its rear end, as at 25, to a side plate of the machine. A second set of parallel links 26 is also connected to the shift rail. Thus each of these links is pivoted at its forward end, as at 27, to a depending arm 28 on the shift rail 18, whereas the rear end portion of each link is pivoted at 29 to the frame of the machine. The links 26 are extended rearwardly beyond their pivots 29 to form arms 30 which are united by a cross bar or rod 31. The shift rail and the parts carried thereby are thus mounted for case shifting movement under the control of suitable case shifting mechanism such, for exam le, as that disclosed in my application, Serial No. 7 91,734 hereinbefore referred to, and in which ap lication the case shift mechanism is claimed The universal bar 9 has fixedly connected therewith a centrally disposed rearwardly extending arm 32 formed at the rear portion thereof as an enlarged plate 33. This plate has a rear contact edge 3435 which is operative on the escapement mechanism as disclosed in my application, Serial No. 795,667, filed Oct. 17th, 1913. The universal bar and the member 32-33, rigidly connected therewith, are supported on the frame of the machine for fore and aft movement. Thus parallel upright links or arms 36 are pivoted at their upper ends, as at 37, to ears 38 riveted at 39 to the universal bar. The lower ends of these links or arms 36 are fixedly connected to a rock shaft 40 su orted by ears 41 on a bracket late 42, t e 'atter being secured to the type ar segment by screws 43. A rearwardly extending arm 44 on the bracket plate 42 is provided with an upwardly pro'ecting ear 45 to which a centrally dispose link 47 is pivoted at 46. The upper end of this link is ivoted at 48 to the actuating member 33. 'I he universal bar is thus supported on the frame of the machine for movement under control of the type bars at each printing operation.

One of the links or arms 36 is extended rearwardly beyond its pivotal center to form a crank arm 49ywhich is engaged by a suitable actuating device (not shown) under control of the space key as disclosed in my ap lication, Serial No. 795,667.

X depending bracket 50 has its foot piece 51 secured vto the shift bar by screws 52. This bracket is 'provided with ears 53, one of which is tapped to receive a bearing screw 54. A lock nut 55 secures the bearing screw in its adjusted position. This bearing screw constitutes a pivotal support with which cooperates one end of a trunnion-like pivot fixed to an actuating lever 56, the other end of said pivot being received in a bearing opening in an ear on the bracket 50 corresponding to the ear 53. The actuating lever 56 is thus supported for case shifting movement with the, shift rail and the parts carried thereby. The trunnion-like pivot of the lever 56 carries a pin or crank arm 56 to which one end of a returning spring 56 is connected, the other end of the spring being connected to a bracket arm 50 secured to and depending from the bracket 50. The lower end of the actuating lever 56 is provided with a laterally projecting pin 57 which extends through an upright curved slot 58 in a depending arm 59 on the actuating member 33. An operative connection is thus efi'ected between the actuating member 33 and the actuating lever 56 whereby a rearward movement of the universal bar is effective to turn the actuating lever 56 on its pivot, a return movement of the lever 56 and the parts operatively connected therewith being efl'ected by the spring 56". 'The construction is also such as to afford a movement of the actuating lever 56 with the shift rail inde ndently of the member 33. The upper en of the actuating lever 56 is pivoted at 60 to a link 61, the latter being pivoted at its forward end, as at 62, to a depending arm of an angular lever 63. The rear end of the upper arm of this lever is received in a slot or cut-out 64 in the shift rail 18 and is pivoted to the shift rail at 65. A pin 66 is fixed to the angular lever 63 and projects-from opposite sides thereof and forms a pivot to which a ribbon vibrator, designated as a whole by the reference numeral 67, is connected. This vibrator is best shown in Figs. 1 and 4 from which it will be seen that it extends upwardly in the rear of a type guide 68 fixed to the shift rail by screws 69. The up .r portion of the type guide is bifurcated to form two arms 70 on opposite sides of a central opening 71. The upper end of each arm 70 is bent forwardly at 72 and is provided with an inclined contact face 73 which coiiperates with each type block to guide it to the printing point. The ribbon vibrator has two arms 74 which are spaced apart at the opening 71 in the type guide and each of these arms is provided with op ositely disposed fingers 75 which terminate before they reach contact with each other to provide a central opening 76 between them. A vertically disposed slot 77 is provided between each pair of fingers 75 and the associated arm 74 which'carries them, thus forming a guide slot through which the ribbon .7 8 may extend. The ribbon vibrator is also provided with lugs 79 which extend around the in- I ne r edges of the arms 70 of the type guide and cooperate therewith to guide the vibrator as the latter is moved verticallyto cause the ribbon to cover and uncover the printing po nt. A centrally disposed dependingarm 80 1s formedon the vibrator and extends downwardly through an opening-81 in the type guide. The lower end of this dependmg arm is turned at 82 around the trunnionlike pivot 66 on the angular actuating lever 63.

It will be understood that each printing operation is effeetive'to actuatelthe universal bar which, through the members 33, 56, 61 and 63, is effective to move the vibrator upwardly to bring the ribbon 7 8 into the path of the typ'e on the actuated type bar as it approaches the platen. As will be seen upon reference to Figs. 1 and 4 the depending arm 80 on the ribbon 7 vibratoris provided'with a rearwa-rdly projecting pin 83 which extends through an inclined slot 84 in an angular lever 85 pivoted at 86 by a headed screw to a de endingarm 87 formed on the type guide. he upwardly extending arm of the angular lever 85 is provided with'a pin 88 which is received in a vertically disposed slot 89 in a bar 90. This bar-extends from side to side of the machine transversel thereof and is connected at its ends to rib on feed mechanism to effect a step-by-step feed of the ribbon at each printing operation as will hereinafter more clearly appear. The bar 90 is supported in part and guided by a headed pin 90 fixed at its forward end to the type guide. I

The mechanism associated with each ribbon spool for effecting a step-by-step feed of the ribbon, and for efi'ecting a reversalm the direction of the'feed of the ribbon is the 7 same for both ribbon spools and the descriptionof one applies to the other'except that the parts move in opposite directions to effect a feed of the ribbon in opposite directions. The same reference numerals therefore are employed to designate corresponding parts of the ribbon mechanism at opposite sides of the machine. From an inspec-. tion of Figs. 1 and 5 it will be seen thatthe transverse bar 90 is formed at each end with a depending forwardly extending arm 91 pivoted at 92 to a crank arm 93. Each crank arm 93 is shaped to receive the lower end of ashaft orspindle 94 (see Fig. 2), the latter being flattened on its sides, as indicated at 95, to fixedly connect each crank arm and its shaft to turn together. Aheaded screw 96 has its stem received-"1n a tapped opening in the lower end of the assoclated shaft 94 to hold the crank arm in place on the shaft. Each shaft 94 is received in a bearing sleeve 97 which extends through an opening in one member 98 of a housing, the

other member of said housing being in the nature of a removable cover plate 99. Each bearing sleeve 97 is fixedly connected to the member 98 of the housing by being riveted thereto, as indicated at 100. The upper end portion of eachshalft 94 is flattened on its sides, as indicated M101, and is received in a corresponding opening in a crank arm 102 to fixedly connect the two to turn together. The upper end of each shaft 94 is headed at 103 to hold the associated crank arm 102 on the shaft. An upwardly projecting headed pivot'pin 104 extends from the free end of each crank arm 102 and constitutes a pivot for an actuating pawl 105. The engaging nose of this pawl cooperates with the teeth 106 on a companion' ra't'chet wheel 107,. it being understood that there is one ratchet wheel for each of the ribbon spools 108. From an inspection of Fig. 5 'it will be understood that a pin 109 extends downwardly from each pawl 105, and'by which one endof ratchet wheel 107 has a central opening therein through which the lower end of abearing sleeveor hollow driving shaft or spindle 112 is received. Awasher 113 surrounds the lower end of the bearing sleeve 112 and is interposed between the lower riveted end 114 of the bearingsleeve and body portion of-the ratchet wheel. A collar 115 surrounds the sleeve above the ratchet wheel and bears at its lower face against the ratchet wheel and at its upper edge against a circumferential flange 116 formed on the bearing sleeve. The bearing sleeve is thus fixedly connected to the ratchet, wheel and in effect constitutes an integral portion of the same.- From an inspection of Figs. 2 and 3 it will be seen that a centrally disposed supporting spindle 117 is riveted at 118 to the associated casing member 98 and projects upwardly therefrom near the c'enter of the casing. This spindle has an enlarged portion which forms a circumferential shoulder 1.19 on which the lower end of the associated sleeve or hollow shaft 112 is adapted to bear. Each spindle 117 terminates' at its upper end before the bottom wall of the sleeve 112 is reached as indicated in dotted lines in Fig. 3. Each spindle 117 therefore constitutes a fixed spindle around which the associated sleeve or hollow shaft 112 and the ratchet wheel fixed thereto are adapted to turn. From an inspection of Figs. 3 and 5 it will be seen that the oppositely disposed sides of each Sleeve or shaft 112 are flattened, as indicated at 120, and

is provided at its upper end with a threaded extension 121 for cooperation with a thumb nut. 122. Each ribbon spool 108 has its flanges formed with openingsto correspond 5 to the contour of the hollow shaft 112 on which the spool is adapted to be seated, the lower end of the spool bearing against the associated collar 115, as shown in Fi 2 and 3. Each ribbon spool isthus positively connected to turn with its spindle 112 and ratchet wheel 107 and is held in place thereon by the associated thumb nut 122. From the foregoing description it will be understood that a removal of a thumb nut 122 enables the associated spool 108 to be removed from its hollow shaft 112 without disconnecting or detaching any of the other parts of the construction. It will also be understood that each thumb nut 122 constitutes a finger piece by which its spool may be turned by hand, if desired, to effect a hand feed of the ribbon. The cover plate 99 of each casing is provided with a central openinn through which the upper end of the associated collar 115 is adapted to roject, as shown in Fig. 2, so as to form'a earing against which the lower flange of-the spool may be seated. When a spool is removed from its hollow spindle 112 the cover plate 99 may be removed, and if desired, the associated ratchet wheel 107, and the hollow spindle 112 secured thereto, may be removed from the fixed spindle 117 on which the parts are supported in order to give access to the parts contained within the easing 98-99 which are arranged beneath the ratchet wheel 107. r

In order to prevent a reverse movement of the .ratchet wheel 107 during the 60 backward movement or oscillation of its 410- sociated pawl 123. The opposite end of this spring is connected to a pin 129 which pro jects upwardly from the bottom section 98 of the casing. The force of this spring is exerted to maintain the holdin pawl 123 in cooperative engagement with t e companion ratchet wheel 107.

I have provided ribbon reversing devices whereby when an end of the ribbon is approached the actuating awl 105 for the spool from which the ri bon is being ex-- hausted is automatically rendered effective, and the actuating pawl for the other ribbon spool on which the ribbon is being wound is automatically rendered inoperative .right member on a horizontall on its ratchet wheel, in order to automatically reverse the direction of the feed of the ribbon. This construction includes two ribbon guiding arms 130 one associated with each ribbon spool and each of which is slot- 7 ted at 131 to receive the ribbon as it passes from the associated ribbon spool to the ribbon vibrator'and thence to the other spool. Each ribbon guiding arm 130 forms an updisposed lever arm 132 which extends t rough an opening or cut out 133 in the associated cover plate 99 of the casing. This lever 0r crank arm therefore extends into the asociated casing, beneath the ratchet wheel contained therein, and is fixedl secured intermediate its ends to a rock sha or spindle 134 by being riveted thereto, as indicated at 135 in Fig. 2. The shaft or spindle 134 is supported by the companion casing section 98 in the same manner as the shaft 94. Thus a bearing sleeve 136 extends through an opening in the companion casing section 98 and is riveted thereto at 137. Each lever arm 132 is provided with an arm 138 which is ex- 90 tended beyond the shaft 134 and around the pivotal axis of the companion ribbon spool. h1s arm terminates in an angularly disposed member 139 rovided with two contact ortions 140 an 141. As will be understoo from an inspection of the parts of the left-hand ribbon spool, as shown in Fig. 5, these contact members are adapted to cooperate with the associated pawls 105, 123 to move them out of engagement with the associate ratchet wheel 107 and to render them inoperative thereon. As will be seen from an inspection of the parts associated with the righthand ribbon spool, as shown in Fig. 5, the pawls 'and 123 of one ribbon spool will will be maintained in cooperative engagement with the associated ratchet wheel when the pawls of the other ribbon spool are thrown out of engagement with the ratchet wheel with which they co-act. This is due to the fact that there is an intermediate connection between the controlling devices 140141 for the two ribbon spools so that said controlling devices for one spool will be moved to the inoperative position when the controlling devices of the other spool are moved to the operative position where they disengage the associated pawls from their ratchet wheel. These connecting devices comprise rearwardly directed bent crank arms 142, each fixedly connected to the lower end of the associated rock shaft or s indle 134. From an inspection of Fig. 2 it will be seen that the lower end of each shaft 134 is flattened on the sides thereof, as indicated at 143, for cooperation with a corresponding opening in one end of the com anion crank arm 142. A headed screw 144 as its stem received in a tapped openin in the lower end of the associated rock shaft 134 to hold the companion crank arm 142 in position' on'its shaft. The rear end of each crank arm 142 is pivotall connected to a connecting link 145 whic versely of the machine from one crank arm 142 to the other, the link extending through an opening or recess in the shift rail 18, as best shown in Figs. 1 and 5.

Each end portion of the ribbon is provided with an abutment or contact device, designated as a'whole by the reference numeral 1&6, in Fig. 5. In the present instance this contact device is in the nature of two washers 147' united by a rivet 148, the washers being placed on opposite sides of the ribbon about midway the width thereof and the rivet 148, passing through the ribbon andthe openings in the washers and fixedly connecting 'th'e washers to the ribbon. Oneof these abntnientsis secured to the ribbon near each end thereof where it is attached tother ibbon spool. The con struction is such that the abutment near a h' d o th 'r bb sweet P s re ish th g i 05 in the ss i t d r bn "ide 13. s will be under tobdrmm Ian nspectionofFig. 5. Ihefeed of the ribbon h' 'rjei is: fl'e ti'v t9 bring n contact devices 146" into engag m nt with itsribbon" guide'arm 130 when the ribbon s about xt us d from'th s i d r on p h 'pil l' f thflibbws thr ugh he t e tact de e 146, the ribb n same-13o i bfi fiiW t turn h a s t d arm"132 and the parts controlled thereby to r n er the associated 1 a is etative.

sh ws t Pads s h y ppe r i st be 0 lr bb spb L-mdinsvbef r -l t ee 1312 has" e m tua d by t bmpan n t atingf t tmen 4, n the r bbon? t will be d rst d at a th l mes-r 'shb n' l t 'figqre e r bbq h s b ii lmost eb pl t i W n vii he i h hd Sbb j'th fi h the bp tibn' Whee 10 "fifths? w en??? 9 th ibbbn it m t "l f the r sht hand ir b nspe l; as the P rt e h li llfl s s "efi et r g" he nta t 4 "fo th lfi h'and sh fin qo te t with s b n guide 139 efi I h f n i extends trans-' re the 'ibbon is exhaus e mm the as;

be understood, therefore, that this is eflective to reverse the direction of feed of the ribbon, and when the right-hand spool is Y exhausted another automatic reverse will take place, again feeding the ribbon on the right-hand spool instead of the left-hand spool.

In order to insure a complete throw of the reversing devices at each actuation thereof and to prevent an acccidental' displacement of the reversing devices from the positions to which they have been shifted, I have pro-- vided'detent mechanism which is shown in Figs. 5 and 6. A cut-out or opening 149 is provided in the lower section 98 of the left hand casing. A sheet metal bracket 150 is secured by "a screw 151 to the bottom of the casing andfis provided with hearing ears 152whichsupport a pivot 153 of a detent roller 154. This detent roller cooperates with a springarin 155 riveted at 156 to the left-hand crank arm 132, the spring arm being-contained within" the left-hand "casing 98 99. The spring arm 155 is formed with an engaging "ro'e'cti0n 157 which is mov able against t e' etent roller to'o'lie side or the other of a verticalplane'drawn through the axis of said roller as the associated arm 132 is shifted to one position 01" the'bther of the two positions which it is ada ted to occupy, el, a position correspon' mg to that represented at "the left-'hand side of Fig. 5 or a position corresponding to that of the lever arm 132 at'th'righ t-hand Side 9f the machih'e- The spring detent'at each side ofthe"projection" 157'is'formed a cam face 157' which, operating against the roller "154, insures a completion of the 'movem nt' f th r v r ina d vi he the n e gin we r rmi t d 1 P i si eor the other of the center'of "the dean; roller 154. Itwillbe understood that this detent is effective notonly on the leftan h' 'm 132' and t Pa s dir c'fly c trolled thereby but is also efiective on the corresponding; parts of the opposite side of the machine through the intermediatearms 142 and link 1 45.

The lower section 98 of each casing is fixedly connected to the shift rail of the machine, as best shownin Fig. 5. Thus the lower section ofeach casing is connected to a bracket 158 by screws 159, each hracket bein connected by screws 160 with the shift rail 18. It will be'understo'od therefore that e ry ip cim of the ib on. upg ad by h Sh r l wit the lattenin' its c merits." Thus the transv Wand the means which a:

. ialuding the angular lever 63, link 61 and lever 56, are carried by and shiftable with the shift rail. The mechanism which is controlled by the actuating bar for operating the ribbon spools is likewise carried b and is shiftable with the shift rail. he reversing mechanism by which the direction of the feed of the ribbon is automatically reversed is likewise carried by and shiftable with the shift rail of the machine.

In the operation of the machine each printing movement of a type bar is effective to actuate the universal bar and operate the ribbon vibrator in the manner hereinbefore pointed out. Movement is transmitted from the vibrator to the actuating bar 90 to effect a movement of the latter in the direction of its length. This movement is transmitted to both of the pawls 105. However, but one of these pawls at a time is maintained in engagement with its ratchet wheel and but one of them therefore is effective at a time, so that the ribbon will be fed in one direction or another depending on the positions of the automatically actuated controlling devices 1&0, 141. As hereinbefore explained, when the ribbon is about exhausted from one spool, as shown at the left-hand side of Fig. 5, the abutment 146 near that end of the ribbon will co-act with its ribbon guide 130 to automatically shift the members 132, 138, 139, 140 and 141, thus bringing about an engagement between the pawls 105 and 123 at the left-hand side of the machine with their companion ratchet wheel to feed the ribbon on to instead of off of the left-hand ribbon spool. This same movement of the parts automatically throws the pawls 105 and 123 for the right-hand ribbon spool out of engagement with the right-hand ratchet wheel 107.

It will'be understood from the foregoing description that the returning spring 56 is effective to return the universal bar and all of the parts controlled thereby to normal position. This includes the bar 90 and the feed pawls 105 controlled thereby. It will be seen therefore that at a depression of a finger'key the associated type bar will be moved to the printing position and will coact with the universal bar to positively move the latter rearwardly. This positively effects a movement of the bar 90 to the right from the position shown in Fig. 5 and positively. effects a movement of both feed pawls 105 to the left. If the left-hand spool be the driven spool this positive movement of the pawls is effective to positively turn the left-hand spool. However, the right-hand spool is always turned by its pawl during the 1 return movement of the universal bar under construction, effective in use and ma be manufactured at small cost, most 0 the parts being stamped up or made of sheet metal. Moreover, it will be understood that the construction is such that the parts may be readily assembled, and that access may be readily gained thereto without dismantling other parts of the construction. F urthermore, the ribbon feed and reversing mechanism may be assembled outside of the machine and introduced as a unit into the machine.

The construction herein described and shown in the accompanyin drawings is in the nature of a modified Form of the construction disclosed and claimed in my application, Serial No. 802,785, filed November 24, 1913, and which has been hereinbefore referred to. Features which are common to the two constructions are claimed in my said previously filed application, Serial No. 802,785, whereas the claims in the present case are restricted to features not disclosed in said previously filed case.

The construction of my application, Serial No. 802,785, obviates certain disadvantages of the present construction by positively feeding the active spool during the rearward movement of the universal bar and irrespective of whether the ri ht-hand or left-hand spool is the active or riven spool.

While I have shown and described with considerable particularity one form of construction embodying my invention, it should be understood that various changes may be made without departing from the spirit and scope of my invention and that certain features of the invention may be employed without others. 1

\Vhat I claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, the combination ofa ribbon feed actuating bar which extends transversely across the machine, means controlled thereby for feeding the ribbon, a ribbon vibrator, and means controlled thereby for operating said actuating bar.

2. In a typewriting machine, the combination of a ribbon feed actuating bar which extends transversely across the machine, means controlled thereby for feeding the ribbon, a ribbon vibrator, and means controlled thereby for effecting a back and forth movement of said actuating bar in the direction of the length thereof at each operation of the ribbon vibrator.

3. In a ty writing machine, the combination of ri bon spools arranged at op 0- site sides of the machine, an actuating ar which extends transversely of the machine ribbon spool actuating means associated with each ribbon s 001 and operated by said actuating bar, a ribbon vibrator, and means controlled thereby for operating said actuating bar.

4. In a. typewriting machine, the combination of a ribbon feed actuating bar which extends transversely across the machine, means controlled thereby for feeding the ribbon, a ribbon vibrator, means controlled thereby for operating said actuating bar, and automatically operating reversing means for changing the direction of the feed of the ribbon.

5. In a typewriting machine, the combination of a ribbon feed actuating bar which extends transversely across the machine, means controlled thereby for feeding the ribbon, a ribbon vibrator, means controlled thereby for effecting a back and forth movement of said actuating bar in'the direction of the length thereof at each operation of the ribbon vibrator, and automatically operating reversing means cooperating with said ribbon feeding .means to render the movements of said actuating bar effective to feed the ribbon first in one direction and then in the other.

(3. In a typewriting machine, the combination of ribbon spools arranged at opposite sides of the machine, an actuating bar which extends transversely of the machine, ribbon spool actuating means associated with each ribbon spool and ope-rated by said actuating bar, a ribbon vibrator, means controlled by an actuation thereof for operating said actuating bar, and automatically operating reversingv means for controlling the actuating means associated with each spool so that one actuating means will be rendered operative when the other is rendered inoperative.

7. In a typewriting machine, the combination of a ribbon feed actuating bar which extends transversely across the machine, pawl and ratchet mechanism controlled by said bar, a ribbon vibrator, and means controlled thereby for actuating said bar.

8. In a typewriting machine, the combination of a pair of ribbon spools, a ratchet wheel for each ribbon spool, a pawl for each ratchet wheel, an actuating bar for moving said pawls, a ribbon vibrator, and means controlled by said vibrator for actuating said bar.

9. In a typewriting machine, the combination of a pair of ribbon spools, a ratchet wheel for each ribbon spool, a pawl for each ratchet wheel, an actuating bar for moving said pawls, a ribbon vibrator, means controlled by said vibrator for actuating said bar, and automatically operating reversing means for disengaging one of said pawls from its ratchet wheel and for simultaneously effecting an engagement of the other of said pawls with its ratchet wheel.

10. In a front-strike typewriting machine which comprises a shiftable platen and shiftable ribbon feed mechanism including a longtiudinally reciprocating bar, the combination with said bar, of a ribbon vibrator, and devices which operatively connect the bar to the vibrator and enable the bar to be actuated by the vibrator.

11. In a front-strike typewriting machine which comprises a shiftable platen and shiftable ribbon feed mechanism, the .combination with the feed mechanism, of reversing mechanism dependent for its action on the feed mechanism, and a ribbon vibrator operatively connected to the feed mechanism to actuate'the latter by an operation of the vibrator.

12. In a front-strike typewriting machine,

the combination of a platen-supporting shift-rail, a ribbon vibrator mounted thereon, a feed bar carried by and extending lengthwise of said rail and movable longitudinally with relation thereto, and means to transmit motion to the feed bar from the I vibrator.

13. In a front-strike typewriting machine, the combination of a platen-supporting shift-rail, a feed bar shiftable with the shift rail and extending lengthwise of said rail and movable longitudinally with relation thereto, ribbon Winding mechanism actuated by the feed bar, a ribbon vibrator operative to actuate said feed bar, and reversing mechanism which is supported by the shift rail and which is dependent for its action on the winding mechanism.

Signed at Syracuse, in the county of Onondaga and State of New York, this 25th day of November, A. D. 1913.

ARTHUR J. BRIGGS.

Copies m: this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

